Erigeron decumbens - Willamette Daisy is a showy, tall, blue- or pink-flowered perennial that often grows in clumps and can reach nearly five feet in height -- early Willamette Valley pioneers described wildflowers as high as the belly of a horse. Each taprooted individual, with its numerous stems, may bear 20 to 30 heads. On robust plants, these heads may be nearly 4 centimeters across, with yellow disk flowers and blue (sometimes pale pink) rays. Most of its long narrow leaves have three veins. Willamette daisy blooms in our Willamette Valley wetlands in June and early July. The species, although once common throughout the prairies of northwestern Oregon, is now restricted to small scattered sites from southern Washington County to the Eugene area of Lane County. Its habitat has vanished since pioneer times due to draining and filling of wetlands, agriculture and grazing, and urbanization, as well as unmonitored hot prairie fires, competition with invasive species, and secondary succession of shrubs and trees.